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-rw-r--r--ext/mixed/js/dom.js66
1 files changed, 66 insertions, 0 deletions
diff --git a/ext/mixed/js/dom.js b/ext/mixed/js/dom.js
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+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+class DOM {
+ static isPointInRect(x, y, rect) {
+ return (
+ x >= rect.left && x < rect.right &&
+ y >= rect.top && y < rect.bottom
+ );
+ }
+
+ static isPointInAnyRect(x, y, rects) {
+ for (const rect of rects) {
+ if (DOM.isPointInRect(x, y, rect)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ static isPointInSelection(x, y, selection) {
+ for (let i = 0; i < selection.rangeCount; ++i) {
+ const range = selection.getRangeAt(i);
+ if (DOM.isPointInAnyRect(x, y, range.getClientRects())) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ static isMouseButtonPressed(mouseEvent, button) {
+ const mouseEventButton = mouseEvent.button;
+ switch (button) {
+ case 'primary': return mouseEventButton === 0;
+ case 'secondary': return mouseEventButton === 2;
+ case 'auxiliary': return mouseEventButton === 1;
+ default: return false;
+ }
+ }
+
+ static isMouseButtonDown(mouseEvent, button) {
+ const mouseEventButtons = mouseEvent.buttons;
+ switch (button) {
+ case 'primary': return (mouseEventButtons & 0x1) !== 0x0;
+ case 'secondary': return (mouseEventButtons & 0x2) !== 0x0;
+ case 'auxiliary': return (mouseEventButtons & 0x4) !== 0x0;
+ default: return false;
+ }
+ }
+}